IPMAT Rohtak 2020 (QA) PYQs

Let $A = \{a, b, c, d, e\}$. The no. of subsets that contain exactly 3 of these elements are?

Let $n$ be the number of ways in which 20 identical balloons can be distributed among 5 girls and 3 boys such that everyone gets at least one balloon and no girl gets fewer balloons than a boy does. Then

The total number of positive integer solutions of $21 ≤ a + b + c ≤ 25$ is